Estádios de abertura floral e condicionamento em inflorescências de bastão-do-imperador

Abstract

RESUMOAs espécies tropicais apresentam grande importância no mercado de flores, mas informações sobre colheita e procedimentos pós-colheita ainda são limitados. Para a maioria das espécies tropicais, existem poucas informações sobre soluções a serem utilizadas para condicionamento ou manutenção após a colheita. Assim, objetivou-se avaliar a durabilidade e qualidade pós-colheita de hastes florais de bastão-do-imperador em concentrações de sacarose na solução de condicionamento e diferentes estádios de abertura floral. Hastes florais foram colhidas no início da manhã e tratadas com solução de condicionamento com sacarose nas concentrações 0 (controle), 10, 20, 30% por 24h, nos três estádios de abertura floral: inflorescências com as brácteas 1/3, 2/3 ou totalmente abertas. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 4x3x6, com 3 repetições em parcela subdividida no tempo. As avaliações foram realizadas em intervalos de 3 dias, determinando-se a massa fresca das hastes florais e avaliação de qualidade das inflorescências por meio de notas, em escala de 0 a 4. Observou-se que a durabilidade comercial das hastes florais é maior (10 dias) quando as inflorescências são colhidas com 1/3 das brácteas abertas. Recomenda-se a realização de condicionamento em hastes florais de bastão-do-imperador com concentração de 20% de sacarose por 24h para inflorescências colhidas com 1/3 e 2/3 das brácteas abertas. Palavras-chave: Etlingera elatior, plantas tropicais, pós-colheita, sacarose. ABSTRACT Developmental stage and pulsing in inflorescences of torch gingerTropical species are very important in the flower market, but information in harvest and postharvest procedures are not enough. There is not enough information on pulsing or holding solutions for most tropical species. The objective was to evaluate the durability and quality of postharvest torch ginger flower stems (Etlingera elatior) at sucrose concentrations in pulsing solution and different flower opening stages. Flower stems were harvested early morning at three flower opening stages: inflorescences with 1/3, 2/3 and completely open bracts, withal the stalks were pulsed with sucrose solution at concentrations of 0 (control), 10, 20, and 30% for 24h. Experimental design was completely randomized in a 4x3x6 factorial with 3 replications in a split plot in time. Evaluations were performed every 3 days, determining the fresh weight of flowers and assessing inflorescence quality through scores on a 0-4 point scale. Commercial vase life of stalks is longer (10 days) when inflorescences are harvested with 1/3 bracts opened. It is recommended to carry out pulsing in torch ginger flower stems with concentration of 20% sucrose for 24h for inflorescences harvested with 1/3 or 2/3 of the bracts opened.

Quality maintenance Tropical Plants

“…In general, the optimum sugar concentration ranges with the treatment to be used and the species to be preserved. Carneiro et al (2014) studied torch ginger postharvest and observed that plants submitted to pulsing for 24 hours with a concentration of 20% sucrose had greater longevity, compared to control plants. However, Dias and Castro (2009) studied Zingiber spectabile using pulsing solutions for 24 hours at concentrations of 2, 4, 8, 16 and 32% sucrose and these treatments had no effect on the postharvest life of this species.…”

Water relations in cut calla lily flowers maintained under different postharvest solutions

“…Calla lilies are usually harvested when they show extended spathes (Almeida et al, 2009); however, different harvest stages have been recently accepted for use in decoration. Harvesting at earlier stages (closed or partial opening) can provide inflorescences with better quality and longevity (Carneiro et al, 2014;Sales et al, 2015;Mattos et al, 2017, Sanches et al, 2017, Sales et al, 2018, Nascimento et al, 2019. However, limited information is available on the influence of chemicals in the storage solution on the longevity and water relations of early harvested floral stems.…”

Amido e açúcares solúveis totais em pós-colheita de inflorescências de bastão-de-imperador

“…The floral opening stage, in which the inflorescences are harvested, among other aspects, influences the longevity, the commercialization period, as well as the durability (vase life) (BARBOSA et al, 2006;CARNEIRO et al, 2014). Floral opening is related to cell expansion and carbohydrate balance.…”